最新刊期
      卷 ， 期 1 ， 1998
      • Zhang Xu
        Issue 1, Pages: 1-4(1998) DOI: 10.13756/j.gtxyj.1998.01.001
        摘要：The paper begins with describing the application and technological development of optical fiber communications in backbone transport network of national broadband network, including broadband optical fiber amplifier, dense wavelength division multiplexing, laser modulator integration , opto-electronic integrated receiver, photonic devices and all optical network. Then,it describes the application of optical fiber transmission in local access network,CATV network,and local area network, including three cases of FTTH,FTTC,FTTB,and two methods of hybrid fiber &. coax,and passive optical network. Finally, the paper predicts the future prospect of communication network infrastructure,involving the fixed &?mobile convergence,fiber &?wireless development at same time,and the necessity of continued development of optical fiber communications.  
        关键词：optical fiber communication;backbone network;access network;fiber amplifier;wavelength division multiplex   
        2
        |
        158
        |
        8
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504651 false
        发布时间：
      • Yan Jun Yi Heqing
        Issue 1, Pages: 5-9(1998) DOI: 10.13756/j.gtxyj.1998.01.002
        摘要：The paper discusses the theory of 2. 5 Gbit/s SDH optical receiver, and a high sensitivity, wide dynamic range receiver module for 2. 5 Gbit/s SDH has been developed, this module has been used in 2. 5 Gbit/s SDH project.  
          
        2
        |
        53
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504585 false
        发布时间：
      • Lu Jianxin
        Issue 1, Pages: 10-13(1998) DOI: 10.13756/j.gtxyj.1998.01.003
        摘要：This paper introduces a method we have realized orderwire telephone in SDH equipment,some questions in designing orderwire are described and a solution of hardware and software is presented. This paper also describes the orderwire board in detail.  
        关键词：orderwire telephone;segment overhead;protection   
        3
        |
        41
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504631 false
        发布时间：
      • Issue 1, Pages: 13(1998)
        摘要：<正>邮电部武汉邮科院研制开发的14项科研成果及新产品于春节前通过鉴定。其中,5项属国内首创,5项达到国际当前同类产品的先进水平或商用水平,4项达到国际同类产品商用水平。 系统设备通过鉴定的新产品有:RIE 260T（R）-0l专用远端接口光传输终端（中继）设备、GZF900-IA/B型移动通信光纤分布式直放站、LAN-EI-01A高速网络互连器、GZF900ⅢA/B型移动通信光纤传输直放站、DLCC（R）-02集成数字用户环路局（远）端设备。这5项新产品均属国内首创,符合新产品生产定型要求,可以批量生产。 光纤光缆通过鉴定的项目是:非零色散位移单模光纤、PCVD法数据光纤、钢丝铠装光缆、光缆用高阻水油膏、全介质自承式架空光缆。这些科研成果及新产品达到国际当前同类产品的先进水平或商用水平。  
          
        2
        |
        22
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504667 false
        发布时间：
      • Zheng Xueyan Guan Kejian Ye Peida
        Issue 1, Pages: 14-17(1998) DOI: 10.13756/j.gtxyj.1998.01.004
        摘要：The saturation filitering effect of semiconductor optical amplifier is analyzed theoretically. The relationship of the parameters that influnce the modulation speed are given, the ways to design the optimum the semiconductor optical amplifier with high frequency response are proposed.  
        关键词：semiconductor optical amplifier;saturation filtering effect;response speed   
        4
        |
        37
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504596 false
        发布时间：
      • Ma Yunying Ma Shiying
        Issue 1, Pages: 18-23(1998) DOI: 10.13756/j.gtxyj.1998.01.005
        摘要：This paper firstly introduces the concept and characteristic of access network, then proposes the design method of highly reliably optical fiber network. The route construction algorithm and reliability calculation that are used in the design method are proposed,and a comparison is made between the new method and conventional design method. Finally,it is concluded that the new method is more economically and reliably compared with the conventional method.  
          
        2
        |
        57
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504688 false
        发布时间：
      • Li Jianqing et al.
        Issue 1, Pages: 24-28(1998) DOI: 10.13756/j.gtxyj.1998.01.006
        摘要：Based on the linearization approximation,nonlinear schrodinger equation is quantized, the influences of the soliton source chirp on quantum soliton is studied by using the back-propagation method. Numerical results show that the squeezing ratio decreases at some initial distance when the soliton source chirp is positive.  
        关键词：optical soliton;chirp;squeezing ratio   
        2
        |
        29
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504556 false
        发布时间：
      • Issue 1, Pages: 28(1998)
        摘要：<正>为了给信息化提供强有力的支撑,在国家信息化中发挥主导作用,邮电部门自觉适应两个根本性转变,瞄准信息化方向,加快了“八纵八横”格状光缆骨干网的建设速度。在光缆骨干网建设中,邮电部门采取多种方式筹措资金,并积极与军队和地方政府合作,使“八纵八横”骨干网以纸上兰图迅速变成现实。去年,我国新建或建成14条长途光缆干线,其中我国通信建设史上施工难度最大的兰州—西宁—拉萨光缆完成全线敷设任务。随着兰西拉光缆今年的全面建成开通,我国最后一个未通达光缆的省会城市——拉萨,不久也将实现光缆干线传输并和全国连通。至此,原定到2000年才能完成的“八纵八横”全国光缆骨干网,今年底便可建成。去年全国长途光缆长度已达15.4万km,今年邮电部又提出新增长途光缆干线5万km的目标。这样,“九五”计划中提出的到本世纪末我国光缆长度达到20万km的目标,将于今年提前成。  
          
        2
        |
        47
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504618 false
        发布时间：
      • Zou Linsen
        Issue 1, Pages: 29-32(1998) DOI: 10.13756/j.gtxyj.1998.01.007
        摘要：In the paper,theoretical calculated formula of tension and overhang vertical extension for ADSS have be derived. These formulas are useful for manufacturers and users in design.  
        关键词：ADSS;tension;overhang vertical extension   
        2
        |
        45
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504565 false
        发布时间：
      • Wang Shubin Deng Ducai et al.
        Issue 1, Pages: 33-37(1998) DOI: 10.13756/j.gtxyj.1998.01.008
        摘要：This paper introduces the advantage of PCVD method and describes the long PCVD equipment for making optical fiber preforms, performance parameters and the overview of applications.  
        关键词：PCVD;optical fiber preform;microwave system   
        2
        |
        174
        |
        4
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504572 false
        发布时间：
      • Zhu Yinian
        Issue 1, Pages: 38-40(1998) DOI: 10.13756/j.gtxyj.1998.01.009
        摘要：A permanent index change of 0. 005 1% was induced in Sm+2/Sm+3 doped aluminosilicate fiber by irradiating 2 W of multi-line output from an Ar ion laser. The photosensitivity was detected by measuring a shift in LPn mode cutoff wavelength. Bleaching of a broad absorption band in the visible was also observed. The origin of the photosensitivity in the Sm doped optical fiber is the bleaching of Sm+2 ion absorption bands enhanced by multiphoton processes.  
        关键词：rare earth;doped aluminosilicate optical fiber;photosensitivity   
        2
        |
        44
        |
        1
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504660 false
        发布时间：
      • Ding Guoqing
        Issue 1, Pages: 41-45(1998) DOI: 10.13756/j.gtxyj.1998.01.010
        摘要：The modeling rocking curves by X-ray diffraction for multi-thin-layer heterostructure materials and the measured rocking curves from one of stress and tensile quantum well meaterials are reported in this paper. They indicated that modeling-analysing of the measured rocking curves by computer is a scientific method for precisely finding the lattice-mismatch and quantum well preiod. The application ranges for the simple calculation formula on the lattice mismatch and quantum well periods are analysed and disscussed.  
        关键词：Rocking curves;modeling-analysing;strained-quantum well   
        2
        |
        219
        |
        3
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504611 false
        发布时间：
      • Chen Shanbao Lin Gengqi
        Issue 1, Pages: 46-49(1998) DOI: 10.13756/j.gtxyj.1998.01.011
        摘要：The technique of RF magnetic control sputtering metallic Ti film has been introduced in this paper. Measurements have been carried out on Ti film optical absorption charateristics and the optical absorption mechanism has been analyzed with the classical electronic theory.  
        关键词：magnetic control sputtering;metallic absorption film;optical absorption   
        2
        |
        164
        |
        5
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504677 false
        发布时间：
      • Issue 1, Pages: 49(1998) DOI: 10.13756/j.gtxyj.1998.01.012
        摘要：<正>NEC、三菱电机、HP3公司于1997年10月8日宣布:同意光模块（SMT光模块）规格标准化。今后按照通用的规格生产产品,其他通信设备厂家也考虑了采用通用的规格。 光模块是电光信号相互变换（E/O、O/E）的部件,主要用于光中继器或用户终端机等。 通用化的规格:端子形状为扁平引线,端子配置数8个插头（引线）;印刷布线板的安装图形;与光纤的接续接口。 这次通过SMT光模块规格的通用化,不仅可稳定地供应该产品,而且可以降低生产成本。同时便于部件小型化,提高产品的性能。由于这次规格通用化中,与原来主要使用的8引线型光横块采用相同的端子,因  
          
        2
        |
        19
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504628 false
        发布时间：
      • Issue 1, Pages: 50-54(1998) DOI: 10.13756/j.gtxyj.1998.01.013
        摘要：简要介绍了京九广SDH干线光缆系统工程;叙述了误码性能指标的计算方法;总结了误码性能指标与测试中应重视的若干问题;提出了误码性能测试中疑难故障的处理方法。  
        关键词：SDH;误码性能;指标   
        2
        |
        14
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504644 false
        发布时间：
      • Issue 1, Pages: 54(1998) DOI: 10.13756/j.gtxyj.1998.01.014
        摘要：<正>意大利电信将进行10 Gbit/s的现场传输试验  
          
        2
        |
        13
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504641 false
        发布时间：
      • Issue 1, Pages: 55-57(1998) DOI: 10.13756/j.gtxyj.1998.01.015
        摘要：叙述了光缆线路自动监测系统的基本组成、基本原理和监测方式,以及建立光缆自动监测系统应注意的问题。  
        关键词：OTAU;自动监测;TSC;RTC   
        2
        |
        25
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504669 false
        发布时间：
      • Issue 1, Pages: 58(1998) DOI: 10.13756/j.gtxyj.1998.01.016
        摘要：<正>最近我们在某地光通信线路排除故障时,在多种不利因素限制条件下,决定采用压缩法或称逼近法顺利地将故障排除了。现介绍给有关从事光路维护人员,以便从中得到启示。 该线路于10年前敷设,10年中光路又经历了数次变动与改造。线路路由地形复杂,且有400余米在丛林中穿铁管上山。由于时间较长,工作人员变动  
          
        3
        |
        14
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504624 false
        发布时间：
      • Issue 1, Pages: 59-60(1998) DOI: 10.13756/j.gtxyj.1998.01.017
        摘要：<正>光缆的芯数越多,对施工质量要求也就越高。目前,国内光缆工程施工主要是采用人工挖沟、放缆,常常会造成光缆外皮划伤破损,光纤受压损耗变大,甚至断纤。光纤光缆的断纤可分为两大类:已明原因断纤和不明原因断纤。已明原因断纤是指那些在布放光缆的过程中不小心人为把光缆外皮划伤、破皮、死弯,甚至背扣,也有少数不法分子用铁锹铲断,从光缆外护层可直接看到。不明原因断纤是指那些在  
          
        4
        |
        43
        |
        2
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504620 false
        发布时间：
      • Issue 1, Pages: 61(1998) DOI: 10.13756/j.gtxyj.1998.01.018
        摘要：<正>美国朗迅公司的贝尔试验室最近成功地演示了单个激光器波分复用发射机系统可产生206个波长信道,每一波长信道均可独立地传送数据。 16个波长信道的波分复用系统前不久刚刚投入商业应用,206个波长信道的波分复用系统又有试验样机出现。光纤通信技术发展之快真叫人难以置信。 通常的波分复用系统采用多个单频激光器产生  
          
        2
        |
        28
        |
        0
        <HTML>
        <Meta-XML>
        <引用本文> <批量引用> 27504608 false
        发布时间：
      0